oracle的安装文件提供了经过编译的一些组件--半成品这些组件可以通过特定的参数配合link 生成可执行文件--成品。比如 linux下打开aio就重新link oracle执行文件。
当oracle软件出现问题或例如os升级的时候，例如，刚从别的机器把软件打包过来的时候也会用到。
不是用编译器编译一吧，只要重新link就可以了，安装过程中 界面就有一个显示 link 的过程。 ------------------------ 在源库上：将源端数据库的oracle数据库文件（不包含数据文件dbf, log ） oracle@r05g02020-vm2.yh.com:/opt/oracle>ll total 48 drwxr-xr-x 4 oracle oinstall 4096 Apr  1 22:07 10g drwxr-xr-x 3 oracle oinstall 4096 Apr  1 13:34 admin drwxr-xr-x 2 oracle oinstall 4096 Apr  1 13:34 flash_recovery_area drwxr-xr-x 4 oracle oinstall 4096 Apr  1 13:34 oradata drwxrwxr-x 6 oracle oinstall 4096 Apr  1 18:27 oraInventory drwxr-xr-x 3 oracle oinstall 4096 Apr  1 13:34 products oracle@r05g02020-vm2.yh.com:/home/oracle> scp -r flash_recovery_area  oracle@10.249.13.11:/opt/oracle/ oracle@r05g02020-vm2.yh.com:/home/oracle> scp -r products  oracle@10.249.13.11:/opt/oracle/ oracle@r05g02020-vm2.yh.com:/home/oracle> scp -r admin oracle@10.249.13.11:/opt/oracle/ oracle@r05g02020-vm2.yh.com:/home/oracle> scp -r 10g oracle@10.249.13.11:/opt/oracle/ oracle@r05g02020-vm2.yh.com:/home/oracle> scp -r oraInventory oracle@10.249.13.11:/opt/oracle/ 在目标库上 root@r01c05011.yh.com # su - oracle oracle@r01c05011.yh.com:/home/oracle>cd $ORACLE_HOME/rdbms/lib oracle@r01c05011.yh.com:/opt/oracle/products/10.2.0/rdbms/lib>ls config.c      hormc.o       kkxwtp.o   kzlnlbac.o      rfscom.o    skfodpt.o   tg4pwd.o config.o      hormd.o       kopc.o     libdbtools10.a  rfsd.o      skrmpt.o    tstshm.o cursize.o     horm.o        kprnts.o   libdsga10.a     rfsin.o     skrnpt.o    ttcoerr.o dbfsize.o     hormt.o       kprwts.o   libknlopt.a     rfsxc.o     skrspt.o    ttcsoi.o defopt.o      hout.o        kpucb.o    libodm10.a      s0exudrv.o  sllfls.o    wpspldrv.o dmndm.o       hsxaora.o     kpudfo.o   libperfsrv10.a  s0impdrv.o  srfsd.o     xaondy.o dmndmse.o     ins_rdbms.mk  kpundf.o   libqsmashr.a    s0kudbv.o   ssbbded.o   xaonsl.o dmwdm.o       jox.o         ksms.o     libskgxns.a     s0kuzr.o    sskfeded.o  xsnoolap.o dumpsga.o     joxoff.o      ksnkcs.o   libskgxpd.a     s0kvpf.o    sskfoded.o  xsyeolap.o env_rdbms.mk  kciwcx.o      ksnkkpo.o  libskgxpu.a     s0udexp.o   sskrmed.o   zsmsdrv.o genezi.o      kcsm.o        ksnktd.o   libxdb.a        s0udimp.o   sskrned.o genksms.o     kfod.o        ksnnni.o   mapsga.o        sbbdpt.o    sskrsed.o hoaoci.o      kgupc.o       ksnnt2.o   maxmem.o        shorm.o     ssoraed.o hoat.o        kgutc.o       ktd.o      nmliblist       shou.o      sstrced.o hoax.o        kkpoban.o     kxmnsd.o   opimai.o        sjsex.o     strcpt.o homts.o       kkxntp.o      k**d.o   osh.o           skfedpt.o   sulmain.o 在$ORACLE_HOME/rdbms/lib 中执行 relink oracle oracle@r01c05011.yh.com:/opt/oracle/products/10.2.0/rdbms/lib> relink oracle chmod 755 /opt/oracle/products/10.2.0/bin Using deferred protocol..  - Linking Oracle rm -f /opt/oracle/products/10.2.0/rdbms/lib/oracle gcc  -o /opt/oracle/products/10.2.0/rdbms/lib/oracle -L/opt/oracle/products/10.2.0/rdbms/lib/ -L/opt/  - Linking DB*Verify utility (dbv) rm -f /opt/oracle/products/10.2.0/rdbms/lib/dbv gcc -o /opt/oracle/products/10.2.0/rdbms/lib/dbv -L/opt/oracle/products/10.2.0/rdbms/lib/  - Linking Agent Control Utility rm -f /opt/oracle/products/10.2.0/rdbms/lib/agtctl gcc -o /opt/oracle/products/10.2.0/rdbms/lib/agtctl -L/opt/oracle/products/10.2.0/rdbms/lib/ -L/opt/oracle/products/10.2.0/lib/ -L/opt/oracle/products/10.2.0/lib/stubs/   /opt/oracle/products/10.2.0/rdbms/lib/hout.o /opt/oracle/products/10.2.0/rdbms/lib/defopt.o  /opt/oracle/products/10.2.0/rdbms/lib/homts.o            /opt/oracle/products/10.2.0/rdbms/lib/shou.o -lagtsh -lpls10  -lplp10 -lpthread  -lclntsh -lsnls10 -lnls10  -lcore10 -lsnls10 -lnls10 -lcore10 -lsnls10 -lnls10 -lxml10 -lcore10 -lunls10 -lsnls10 -lnls10 -lcore10 -lnls10 /opt/oracle/products/10.2.0/lib/libgeneric10.a   `cat /opt/oracle/products/10.2.0/lib/sysliblist` -Wl,-rpath,/opt/oracle/products/10.2.0/lib -lm    `cat /opt/oracle/products/10.2.0/lib/sysliblist` -ldl -lm   -L/opt/oracle/products/10.2.0/lib  -lvsn10 mv -f /opt/oracle/products/10.2.0/bin/agtctl /opt/oracle/products/10.2.0/bin/agtctlO mv /opt/oracle/products/10.2.0/rdbms/lib/agtctl /opt/oracle/products/10.2.0/bin/agtctl chmod 751 /opt/oracle/products/10.2.0/bin/agtctl  - Linking HS ORACLE/OCI agent rm -f /opt/oracle/products/10.2.0/rdbms/lib/hsalloci gcc -o /opt/oracle/products/10.2.0/rdbms/lib/hsalloci -L/opt/oracle/products/10.2.0/rdbms/lib/ -L/opt/oracle/products/10.2.0/lib/ -L/opt/oracle/products/10.2.0/lib/stubs/   /opt/oracle/products/10.2.0/rdbms/lib/shorm.o /opt/oracle/products/10.2.0/rdbms/lib/horm.o    /opt/oracle/products/10.2.0/rdbms/lib/defopt.o  /opt/oracle/products/10.2.0/rdbms/lib/homts.o                 /opt/oracle/products/10.2.0/rdbms/lib/hoaoci.o /opt/oracle/products/10.2.0/rdbms/lib/hsxaora.o /opt/oracle/products/10.2.0/rdbms/lib/xaondy.o -lagtsh -lpls10  -lplp10 -lpthread  -lclntsh -lsnls10 -lnls10  -lcore10 -lsnls10 -lnls10 -lcore10 -lsnls10 -lnls10 -lxml10 -lcore10 -lunls10 -lsnls10 -lnls10 -lcore10 -lnls10 /opt/oracle/products/10.2.0/lib/libgeneric10.a   `cat /opt/oracle/products/10.2.0/lib/sysliblist` -Wl,-rpath,/opt/oracle/products/10.2.0/lib -lm    `cat /opt/oracle/products/10.2.0/lib/sysliblist` -ldl -lm   -L/opt/oracle/products/10.2.0/lib  -lvsn10 mv -f /opt/oracle/products/10.2.0/bin/hsalloci /opt/oracle/products/10.2.0/bin/hsallociO mv /opt/oracle/products/10.2.0/rdbms/lib/hsalloci /opt/oracle/products/10.2.0/bin/hsalloci chmod 751 /opt/oracle/products/10.2.0/bin/hsalloci  省略。。 - Linking Recovery Framework utility (DRSMGRL) gcc -o /opt/oracle/products/10.2.0/rdbms/lib/dgmgrl -L/opt/oracle/products/10.2.0/rdbms/lib/ ================ oracle@r01c05011.yh.aliyun.com:/opt/oracle/products/10.2.0/rdbms/lib> make -f ins_rdbms.mk install chmod 755 /opt/oracle/products/10.2.0/bin rm -f oracle dbv tstshm maxmem orapwd dbfsize cursize genoci extproc extproc32 hsalloci hsots hsdepxa dgmgrl dumpsga mapsga osh sbttest expdp impdp imp exp sqlldr rman            nid extjob extjobo genezi ikfod grdcscan  /opt/oracle/products/10.2.0/rdbms/lib/ksms.s /opt/oracle/products/10.2.0/rdbms/lib/ksms.o  - Linking DB*Verify utility (dbv) rm -f /opt/oracle/products/10.2.0/rdbms/lib/dbv  - Linking Oracle rm -f /opt/oracle/products/10.2.0/rdbms/lib/oracle gcc  -o /opt/oracle/products/10.2.0/rdbms/lib/oracle -L/opt/oracle/products/10.2.0/rdbms/lib/ -L/opt/oracle/products/10.2.0/lib/ -L/opt/oracle/products/10.2.0/lib/stubs/ 省略部分输出。 测试relink结果。 oracle@r01c05011.yh.com:/home/oracle>sqlplus /nolog SQL*Plus: Release 10.2.0.1.0 - Production on Wed Apr 13 16:18:41 2011 Copyright (c) 1982, 2005, Oracle.  All rights reserved. SQL> SQL> SQL> exit